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| r111497 Tuesday 14th August, 2018 at 13:56:44 UTC by superctr |
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| Improve Taito Zoom ZSG-2 sound emulation (#3847) * Improve Taito Zoom ZSG-2 sound emulation zsg2.cpp: implement emphasis filter, this is a noise reduction scheme that amplifies higher frequncies to reduce quantization noise. zsg2.cpp: Add sample interpolation and another adjustable lowpass filter. This seems to be roughly what real hardware does... zsg2.cpp: Improve panning registers and identify DSP output gain registers. * zsg2: minor changes [nw] zsg2: Register 0b appears to be status flags [nw] zsg2: Linear ramping probably makes more sense [nw] * zsg2: slight adjustment of emphasis filter [nw] * zsg2: slight adjustment of emphasis filter #2 [nw] * zsg2: more sober ramping algorithm [nw] |
| [src/devices/sound] | zsg2.cpp zsg2.h |
| [src/mame/audio] | taito_zm.cpp |
| https://github.com/mamedev/mame/commit/9bad37d8cb561bf9dc7b5c48273e9b26f813a119 |
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